Twin window



Jan. 4, 1966 "D. J. RUST 3,226,779

TWIN WINDOW Filed June 11, 1964 2 Sheets-Sheet l I INVENTOR.

David J. Pas! BY W D J. RUST TWIN WINDOW Jan. 4, 1966 2 Sheets-Sheet 2 Filed June 11, 1964 4 7 an a. 7 6 V 6 7 1:1, 5 M

a a v. 1 4. 5 2 3 1 w/r/W/ 9 /ll/lll United States Patent 3,226,779 TWIN WINDOW David Jordan Rust, San Leandro, Califl, assignor to Ryloclr Company, Ltd., San Leandro, Califi, a corporation of California Filed June 11, 1964, Ser. No. 374,393 Claims. (Cl. -52.2)

This invention relates to windows, and particularly to a type of window which includes a horizontally movable sash.

The major object of the invention is to provide a twin or laterally double window so constructed that when the movable sashes are closed heat, cold, and sound transmission are materially reduced which not only enhances living comfort within the building but heating costs are lessened in cold weather and air conditioning loads are not as great in hot weather.

Another important object of the invention is to provide a twin window which includes an outer window unit, an inner window unit, and novel means to secure such units together in a rigid assembly.

An additional object of the invention is to provide a twin window-as above and wherein each window unit includes a metallic framewith novel means which in sulates the inner frame from the outer frame whereby to prevent frosting of, and subsequent dripping of moisture from, the inner window unit.

Still another object of the invention is toprovide, in a twin window unit which includes laterally spaced outer and inner normally fixed or non-slidable sashes, a novel arrangement whereby the inner one of such sashes may be readily removed to permit of washing of the adjacent faces of the panes carried by such sashes.

A further object of the invention is to provide a twin window which is designed for ease and economy of manufacture, and convenience of installation of the inner window unit on the outer window unit.

A still further object of the invention is to provide a practical, reliable, and durable twin window and one which is exceedingly effective for the purpose for which it is designed. 1

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear bya perusal of thefollowing specification and claims.

In the drawings:

FIG. 1 is an elevation of the improved twin window unit, partly broken out and looking at the interior face thereof.

FIG. 2 is an enlarged foreshortened sectional plan of the structure, taken on line 2-2 of FIG. 1.

FIG. 3 is an enlarged foreshortened transverse section taken on line 3-3 of FIG. 1. t ll 1 1 FIG. 4 is a similar view on line 4-4 of FIG. 1. l FIG. 5 is a further enlarged'fragmentary sectional plan view taken on line 22 of FIG. 1, and showing specifically the connection between the frames of the outer and in- .ner window units.

Referring now more particularly to the drawings and to the characters of reference marked thereon, the outer window unit, indicated generally at 1, is of horizontal sash type, and substantially as shown in United States Patent No. 2,918,706, dated December 29, 1959.

Such outer window unit 1 comprises a continuous frame 2, preferably of extruded metal, secured in rigid connection with the related wooden members 3 of the framed 1 jand a horizontally slidable sash 6 disposed-when closed 1 "between the post- 4 and the opposite side of the frame in a plane laterally inward of the sash 5; all as shown in FIG. 2.

The frame 2 also includes a continuous plate 7 projecting laterally inward relative to the laterally outer edges of the members 3, and spaced clear of said members a short distance and substantially parallel thereto as shown in FIGS. 24. At its laterally inner edge, the plate 7 is formed with a continuous flange 8 disposed throughout its extent in a vertical plane lengthwise of the window unit. The flange 8, which for the major portion of its extent projects toward the opening outlined by the frame 2, includes a relatively short lip 9 projecting from the plate 7 away from said opening or toward the related members 3;

'said flange 8, of course, being laterally inward of the path of movement of the sliding sash 6 so as not to interfere with the full movement thereof.

The inner window unit, indicated generally at 10 comprises a continuous frame 11 which outlines a window opening substantially the same size as and matching that outlined by the frame 2. The frame 11 consists of a sill 12, a header 13, and side posts 14-; all included in extruded metal parts connected together in rigid relation. These parts of the frame are parallel to and adjacent though, of course, laterally inward of the plate 7 of frame 2, and said parts-throughout the extent of the frame 11 are formed with a continuous flange 15 disposed parallel to and adjacent the flange 8 of frame 2. The flange 15 is considerably narrower than the flange 8 along the side posts 14, and projects toward the adjacent members 3. Along its outer edge the flange 15 is formed with a channel 16 which embraces the lip 9 of flange 8 in clearance but generally symmetrical relation thereto; a strip of insulating tape 17 being installed to fill the space between the flange 15 and channel 16, and the lip 9 and the corresponding portion of flange 8, as most clearly shown in FIG. 5.

The side posts 14 of frame 11, centrally of their width, are formed with vertical flanges 18 alined with each other across the window opening and defining-with the corresponding portions of the flange 8vertical full-height channels 19. The flanges 18 also define-with other parallel flanges 20 on the laterally inner edges of the side posts 14other full-height channels 21. The above described features are shown in FIG. 2.

The header 13 of frame 11 is formed with a central depending flange 22 alined with the flanges 18 and definingwith the corresponding portion of the flange 8 of said framea channel 23 alined with channels 19. Another flange 24 depends from the laterally inner edge of the header 13 in alinement with the post flanges 20 and defineswith the central flange 22another channel 25 alined with channels 21.

The sill 12 of frame 11 is similarly formed with an upstanding central flange 26 alined with the flanges 18 and defining-with the corresponding portions of the flange 8 of said frame-a channel 27 alined with channels 19' and thus directly below and facing channel 23 Another flange 28 upstands from the laterally inner edge of the sill 12 in alinement with the post flanges 20, and defines-with the central flange 26a channel 29 alined with channels 21 and thus directly below and facing channel 25. The above features of construction are clearly shown in FIG. 3.

A stationary sash 30 projects into the channel 19 directly back from the sash 5 and is of generally the same horizontal extent as said sash 5; the sash 30 being supported in the bottom channel 27, as shown in FIG. 3. A thick weather strip 31 is mounted on and projects from the forward face of the sash 30 in position to engage the adjacent face of the flange 8.

In order to prevent undesired longitudinal sliding of the sash 30 out of the channel 19, the vertical edge of the adjacent flange 8 is formed with a shallow rounded lip 32 which overlaps the inner vertical edge of the strip 31, as shown in FIG. 2.

At its longitudinally inner end, the sash 30 is fitted with a stiff vertical angle strip 33; the height of such strip being such that it just fits between the opposed flanges 22 and 26, as shown in FIG. 4, so that such strip cannot move vertically relative to the flanges. One leg of the strip 33 overlaps and engages the rear face of the adjacent portion of the sash 30, while the other leg of said strip overlies and engages the adjacent vertical edge of the sash, as shown in FIG. 2. Said other leg is detachably secured to the sash 30 by vertically spaced headed screws 34 which, under the heads thereof, pass through horizontal slots 35 open to the forward edge of said leg, as shown in FIG. 5. The strip 33 is thus normally movable horizontally with the sash 30, and since said strip is prevented from upward movement by the upper header flange 22, the sash 30 cannot move upwardly into the channel 23. The purpose of this feature will be later described.

A sliding window sash 36 depends into the channel 29 and is supported from the bottom thereof by suitable means such as rollers 37. A thick weather strip 38 is mounted on and projects from the forward face of the sash 36 in position when said sash is closed-to engage the flange 18 of the adjacent channel 21 as well as the top and bottom flanges 22 and 26, and the rear leg of the angle strip 33 and which leg is in alinement with the flange 18, as shown in FIG. 2. The sash 36 is provided at its opposite sides with suitable vertical handle members 39 to facilitate sliding of the sash to one side or the other.

It may here be noted that the sill 12 and header 13 of the frame 11 are rigidly fixed in connection with the posts 14 by means of self-threading screws 40 which are mounted in said sill and header and engage in bores 41 formed in vertical ribs 42 on the back of the posts 14, and which ribs also serve to reinforce said posts.

The weather stripping engagement of the sashes 30 and 36 with each other and with the parts of the frame 11 engaged thereby provideswhen the sliding sashes are closeda dead air space between the outer and inner window units 1 and 10; the spaced window units together with such dead air space minimizing the transfer of heat and cold. This saves heating costs in winter and, on the other hand, reduces air-conditioning loads during hot weather. Additionally, the arrangement reduces the transmission of sound from the outside and further enhances living comfort.

The provision of the insulation strip 17 between the two window frames also gives protection against the formation of frost on, and subsequent dripping from, the inner window unit.

It is desirable, of course, that the panes of the sashes of the two window units shall be capable of being washed on both sides whenever necessary. The washing of the adjacent faces of the panes of the movable sashes 6 and 36 obviously presents no difliculties since it is only necessary to open one or the other of such sashes in turn, so as to expose the normally inaccessible faces of the panes to the outside or the inside of the window structure for washing, as will be evident.

The washing of the adjacent faces of the panes of the stationary sashes and 30 presents a different problem which, however, is easily solved by reason of the constructional features of the window frame 11, and the method of operation now to be described:

It will be noted that the depth of the upper channels 23 and 25 is sufliciently greater than the depth of the lower channels 2'7 and 29 to enable the portions of the sashes normally disposed in said lower channels to be lifted clear of the latter. This allows the movable sash 36, when first slid along so that it clears the related vertical channel 21, to be lifted so that its lower edge clears the lower channel 29. Then upon tilting said sash rearward- 1y at the bottom so as to clear the rear flange 28 of the channel 29, the sash may be drawn downwardly and away from the frame 11. The stationary sash 30 is then clear of any obstructions laterally inward or rearwardly therefrom.

Thereafter, the angle strip 33 is easily removed from the sash 30 by loosening the screws 34 and pulling said strip laterally inward and clear of said sash. The removal of said strip 33 permits the stationary sash to be lifted sufficiently to clear the lower channel 27; this being an operation which may be performed as soon as the sash 30 is pulled along the horizontal channels to clear the vertical channel 19 normally engaged thereby. This movement can be effected because the weather strip 31 can be deflected or compressedas the sash is pulledso that said strip will move past the lip 32. The sash 30, having been lifted to clear the lower channel 27, may then be tilted rearwardly at the bottom to clear the channel 29 so that the sash may be drawn downwardly and away from the frame 11. Thus, the pane of sash 30 may be readily washed on both sides, as wel as the then exposed face of the pane of the sash 5.

From the foregoing description, it will be readily seen that there has been produced such a twin window as substantially fulfills the objects of the invention, as set forth herein.

While this specification sets forth in detail the present and preferred construction of the twin window, still in practice such deviations from such detail may be resorted to as do not for-m a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the following is claimed as new and useful and upon which Letters Patent is desired:

I claim:

1. A window structure including a frame outlining a window opening and having means forming an endless channel facing into the opening and which channel comprises vertical end portions and horizontal top and bottom portions, a relatively fixed window sash, shorter than the opening, disposed in said opening and engaged with one vertical end portion and the top and bottom portions of the channel and movable horizontally from engagement with said one vertical portion thereof, the channel being arranged to permit removal of the sash from the frame upon the sash being thus moved horizontally, and removable means mounted on the sash and movable horizontally therewith preventing such removal of the sash.

2. A window structure including a frame outlining a window opening and having means forming an endless channel facing into the opening and which channel comprises vertical end portions and horizontal top and bottom portions, a relatively fixed window sash, shorter than the opening, disposed in said opening and engaged with one vertical end portion and the top and bottom portions of the channel and movable horizontally from engagement with said one vertical portion thereof, the channel being arranged to permit removal of the sash from the frame upon the sash being thus moved horizontally, and means provided with the sash and said one vertical end portion of the channel yieldably resisting said horizontal movement of the sash; such means comprising a lip along the inner edge of one side of said vertical end portion of the channel and facing the sash, and a compressible strip on the adjacent face of the sash normally engaging said side of the channel back from the lip.

3. A structure, as in claim 2, including removable means mounted on the sash preventing removal of the latter from the frame.

4. A window structure including a frame outlining a window opening and having means forming an endless channel facing into the opening and which channel comprises vertical end portious and horizontal top and bottom portions, a relatively fixed window sash, shorter than the opening, disposed in said opening and engaged with one vertical end portion and the top and bottom portions of the channel and supported on the bottom channel portion, the sash being movable horizontally from engagement with said one vertical end portion of the chan nel, the top channel portion being sufliciently deeper than the bottom channel portion to permit of upward movement of the sash enough to clear the bottom channel portion and sufiiciently wider than said sash to enable the same when thus moved horizontally and upwardly to be swung rearwardly at the bottom to clear the bottom channel portion, and a removable member on the sash movable horizontally therewith and normally preventing such upward movement thereof.

5. A structure, as in claim 4, in which said member comprises a Wholly exposed strip of rigid material mounted on the end of the sash, opposite that engaged with said 6 one vertical end portion, in underlying relation to and adjacent one lower edge of said top channel portion.

References Cited by the Examiner UNITED STATES PATENTS 2,835,360 5/1958 Bernardoni et a1. 189-75 3,037,589 6/1962 Cole 189-75 X 3,055,468 9/1962 Horejs et a1. 189-75 3,080,023 3/1963 Armstrong 189-64 3,106,753 10/1963 Guldager 20-19 3,136,396 6/ 1964 Sullivan 189-46 HARRISON R. MOSELEY, Primary Examiner. REINALDO P. MACHADO, Examiner. A. I. BREIER, Assistant Examiner. 

1. A WINDOW STRUCTURE INCLUDING A FRAME OUTLINING A WINDOW OPENING AND HAVING MEANS FORMING AN ENDLESS CHANNEL FACING INTO THE OPENING AND WHICH CHANNEL COMPRISES VERTICAL END PORTIONS AND HORIZONTAL TOP AND BOTTOM PORTIONS, A RELATIVELY FIXED WINDOW SASH, SHORTER THAN THE OPENING, DISPOSED IN SAID OPENING AND ENGAGED WITH ONE VERTICAL END PORTION AND THE TOP AND BOTTOM PORTIONS OF THE CHANNEL AND MOVABLE HORIZONTALLY FROM ENGAGE- 